可以划分8个子网，每个子网能容纳的主机数为8190。子网地址分别为135.53.0.0/19 135.53.0.32/19 135.53.0.64/19 135.53.0.96/19 135.53.0.128/19 135.53.0.160/19 135.53.0.192/19 135.53.0.224/19
